[PATCH 1 of 4] store all heads of a branch in the branch cache

[Matt Mackall]

On Tue, 2008-12-23 at 07:53 -0500, John Mulligan wrote:
> On Mon, Dec 22, 2008 at 10:17:58PM -0600, Matt Mackall wrote:
> > On Mon, 2008-12-22 at 19:25 -0500, John Mulligan wrote:
> > > # HG changeset patch
> > > # User John Mulligan <phlogistonjohn at asynchrono.us>
> > > # Date 1229874763 18000
> > > # Node ID 499372d70f9b1961857bdbd7e5177aed130775be
> > > # Parent  3896310bd797a3c0db22654321e88db9cc73d3e7
> > > store all heads of a branch in the branch cache
> > > 
> > > All heads of branches will be stored in the cache.
> > > The new cache format is tagged so that old caches files are invalidated
> > > so that heads distant from tip may be discovered.
> > 
> > This is a suboptimal way to do things, especially for a cache. Consider
> > two different versions of hg accessing the same repo. If we alternate,
> > we repeatedly rebuild the cache.
> 
> That is what happens currently.
> 
> > Or perhaps we confuse the hell out of
> > the old hg. And we have to keep around extra logic to tell when we're
> > looking at different file formats. Instead, if we just change the name
> > to "branchheads.cache" and forget about the old file, there's no
> > confusion at all.
> 
> That sounds good. Currently, there a few tests that cat out the contents
> of the branch.cache file. Should they just be changed to point at the
> new file, or something else?

Point to the new file, please.

-- 
Mathematics is the supreme nostalgia of our time.